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What is the maintenance of the campus recruitment system in Sinopec official website?

This situation is to update the system.

Sinopec official website's exhibition system is under maintenance, which means that when the system is being updated or upgraded, there is a problem with the website or software code program, or the website or software needs to be updated and upgraded, it will generally close to find the problem, deal with the problem, update the content, and then open the website to visit after the treatment.